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- Path: sparky!uunet!ogicse!henson!news.u.washington.edu!nntp.uoregon.edu!cie.uoregon.edu!scavo
- From: scavo@cie.uoregon.edu (Tom Scavo)
- Newsgroups: sci.math
- Subject: functional equation
- Summary: Does f^2 = f' have a real solution?
- Message-ID: <1992Aug18.175757.10216@nntp.uoregon.edu>
- Date: 18 Aug 92 17:57:57 GMT
- Article-I.D.: nntp.1992Aug18.175757.10216
- Sender: news@nntp.uoregon.edu
- Organization: University of Oregon Campus Information Exchange
- Lines: 15
-
- Someone recently brought up the functional equation
-
- f^2 = f'
-
- where f^2 is taken to be the second iterate of f .
- I found a solution in the literature (Babbage, 1816)
- of the form f(z) = a z^b , but I'm still wondering
- if a real solution exists.
-
- I'll summarize any significant response, of course.
-
- Thanks.
- --
- Tom Scavo
- scavo@cie.uoregon.edu
-